Here's the way brand evangelist videos come off to me.
Once somebody becomes a "brand evangelist", his YouTube and blog videos can easily become not much more than click-bait. When I see people showing how to rig up EIGHT Nikon SB-910 speedlights at $589 per unit, in order to get the same flash power as ONE cheap, used Speedotron Brown Line D604 power pack pack and one, single flash head, I start thinking, "Payed shill click-bait content here," or "Preferred loaner gear for him as long as the videos keep being made."
So, $589 x 8 speedlights is $4,712 for the light output, then add + a custom 8-flash mounting bracket and umbrella bracket for $499, and you have a $5,211 "solution" that could be bought from e-Bay for $450. Total. Look around for the videos where a "pro" uses a speedlight lash-up to shoot his 20 frames before the required 10-minute cool-down. Yeahhhhhh, riiiight.
I am not talking about Zack Arias in this example above, but another well-known brand evangelist who has no formal and visible relationship with Nikon...but who CONSTANTLY pitches bullsH*+ solutions that often cost a small fortune, when much better, purpose-built stuff is often available at lower investment. And often with BETTER results, and with MORE features, or greater capability, greater capacity. again...click bait or brand evangelist stuff is all over the web and all over YouTube.
The idea that a small-format 16-megapixel camera is identical to an $8,000 or $10,000 or $40,000 camera solution is just disingenuous. YES, most modern cameras are good enough for most uses. But the idea that a $400 70-300 VR or 70-300 VC lens is the same thing as a 300/2.8 lens on a high-end Canon or Nikon cameras are of equal performance is simply not accurate.
Same thing with comparing a mid-level Sony compact mirrorless against a low-end Nikon d-slr on women's soccer by the dPreview staff...it's simple...pocket cameras and not the equal of even the cheapest Nikon or Canon d-slr cameras for action work, even in daylight. The Nikon 70-300 VR lens way under-performs for action sports compared to a 70-200/2.8 AF-S or a 300/4 AF-S or a 300/2.8 AF-S lens. I've tried all those lenses on the same D3x camera body....the 300/2.8 blows the 300/4 AWAY in focusing over say 1,000 frames...the 70-300 VR will blow focus four or five times over one youth soccer match--on a good day that is.
The idea that everything is the same as everything else is just not supported by the facts--because if it were, we'd ALL be using the iPhone 6s...the best phone and best camera ever invented. Just ask Tim Cook.